package com.zbu.common.core.utils;
import com.zbu.common.core.constants.JwtConstants;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import java.util.HashMap;
import java.util.Map;
public class JwtUtils {
    /**
     * ⽣成令牌
     *
     * @param claims 数据
     * @param secret 密钥
     * @return 令牌
     */
    public static String createToken(Map<String, Object> claims, String secret) {
        String token = Jwts.builder().setClaims(claims).signWith(SignatureAlgorithm.HS512,
                        secret).compact();
        return token;
    }
    /**
     * 从令牌中获取数据
     *
     * @param token 令牌
     * @param secret 密钥
     * @return 数据
     */
    public static Claims parseToken(String token, String secret) {
        return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();
    }

    public static void main(String[] args) {
        Map<String,Object>claims=new HashMap<>();
        claims.put("userId",123456789L);
        System.out.println(createToken(claims,"zxcvbnmasdfghjuiyreqtuiwq"));
        String token="eyJhbGciOiJIUzUxMiJ9.eyJ1c2VySWQiOjEyMzQ1Njc4OX0.rgVT9HXxyzwEPq4c_2gznBlrJ0NIC1wkJZzYml6dddZxVFP0ELAMQRT-o8LcrEIFESHKEuMIfUjhBBvq12ucqw";
        Claims claims1=parseToken(token,"zxcvbnmasdfghjuiyreqtuiwq");
        System.out.println(claims);

    }

    public static String getUserKey(Claims claims) {
        return tostr(claims.get(JwtConstants.LOGIN_USER_KEY));
    }

    public static String getUserId(Claims claims) {
        return tostr(claims.get(JwtConstants.LOGIN_USER_ID));
    }

    private static String tostr(Object value) {
        if(value ==null){
            return "";
        }
        return value.toString();
    }
}
